UNSPSC 11111811: Haydite

A type of expanded shale, slate or clay; used as an aggregate to make lightweight structural concrete

UNSPSC 11111811 Haydite, a Commodity code, encompasses crushed stone, aggregates, and related base materials that state and local governments procure for road construction, pavement maintenance, and public infrastructure projects. Recent solicitations show state and local buyers purchasing limestone, crushed rock, sand, cement-treated base, asphaltic concrete, and riprap for transportation departments, public works, county maintenance operations, and parks departments. The code sees activity across county transportation authorities, municipal public works departments, county maintenance divisions, and special-purpose park agencies. Representative recent solicitations include Collin County, Texas procuring cement treated base, cement stabilized backfill, asphaltic concrete, and surface-treatment aggregates under multiple IFBs with estimated contract values ranging from $600,000 to $3 million and delivery across eight geographic zones; Jackson County, Missouri seeking aggregate sand for general county department use under a 24-month supply contract with bids due November 3, 2026; and Clackamas County, Oregon requesting quotes for multiple aggregate rock products (1/4"-0 through 3"-0 crushed rock, mason sand, fill sand, winter sand, rip rap, and topsoil) for county transportation maintenance and other departments under RFQ, with quotes due October 27, 2026 and contract effective January 1, 2027 through December 31, 2029.

Geographic activity concentrates in Texas (Collin County), Missouri (Jackson County), and Oregon (Clackamas County), with secondary recent activity in Michigan (Detroit), Mississippi (Rankin County), California (Santa Clara County), Florida (Boulder County Parks and Open Space serving Colorado), and Colorado. Collin County emerges as a repeat buyer, having issued three separate IFBs in June and July 2026 for cement treated base, asphaltic concrete, and surface-treatment aggregates—all with October 2026 contract commencement and one-year initial terms with mutual-agreement renewal options. The City of Tampa procured sixteen material types including small and medium washed shell, masonry sand, crushed asphalt, rip rap, and topsoil for shoreline erosion control and infrastructure projects under an ITB with estimated value of $60,000, and included a five percent bid discount for Small Local Business Enterprises. Detroit's RFQs for aggregate materials and asphalt restricted bidding to Detroit-based certified vendors with equalization credit preferences of 1 to 5 percent depending on certification type. Boulder County Parks and Open Space used a qualification-based short-list arrangement for landscaping and erosion control materials over up to five years with project-by-project task orders rather than a fixed annual commitment. Collin County contracts require compliance with TxDOT 2024 standard specifications, certificates of insurance, and recycled material content affidavits; Clackamas County requires FOB delivery, certified scale weigh tickets, and compliance with Oregon Standard Specifications for Highway Construction 2024 Edition. Payment terms across jurisdictions range from NET 30 to NET 60 with monthly invoicing; price adjustment mechanisms tied to Producer Price Index and CPI-U appear in longer-term agreements.